Bunn U3 Operating & Service Manual page 11

TROUBLESHOOTING (cont.)
PROBLEM
Water not hot
Circuit breaker keeps tripping
Water keeps running from swing
spout
Inconsistent coffee yield
Funnels overflow
PROBABLE CAUSE
1. Limit Thermostat
CAUTION - Do not eliminate or
bypass limit thermostat. Use only
Bunn-O-Matic replacement part
#29329.1000
2. Control Thermostat
3. Tank Heater(s)
4. Contactor
1. Circuit Breaker
2. Tank Heater(s)
1. Timer
2. Start Switch
1. Timer
2. Solenoid Valve
3. Lime build-up in swing spout
and pump tubing.
1. Filters
2. Hole in bottom of funnel ob-
structed.
Page 11
REMEDY
Refer to Service - Limit Thermo-
stat for testing procedures. See
page19
Refer to Service - Control Ther-
mostat for testing procedures.
See page 17
Refer to Service - Tank Heater for
testing procedures. See page 30
Refer to Service - Contactor for
testing procedures. See page 15
Refer to Service - Circuit Breaker
for testing procedures. See page
14
Refer to Service - Tank Heater for
testing procedures. See page 30
Refer to Service - Timer for testing
procedures. See page 31 or 33
Refer to Service - Start Switch for
testing procedures. See page 29
Refer to Service - Timer for testing
procedures. See page 31 or 33
Refer to Service - Solenoid Valve
for testing procedures. See page
27
Remove swing spout and insert
deliming rod down into pump
tubing as far as possible.
Use Bunn
filters made for the
®
U3 brewer.
Remove obstruction.
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